Feedback-cooling the fundamental torsional mechanical mode of a tapered optical fiber to 30 mK

Tapered optical fibers (TOFs) are used in many areas of physics and optical technologies ranging from coupling light into nanophotonic components to optical sensing and amplification to interfacing quantum emitters. Here, we study the fundamental torsional mechanical mode of the nanofiber-waist of a...

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Bibliographic Details
Published inarXiv.org
Main Authors Tebbenjohanns, Felix, Jia, Jihao, Antesberger, Michael, Adarsh Shankar Prasad, Pucher, Sebastian, Rauschenbeutel, Arno, Volz, Jürgen, Schneeweiss, Philipp
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 19.09.2023
Subjects
Emitters
Feedback
Nanofibers
Optical fibers
Physics - Instrumentation and Detectors
Physics - Optics
Room temperature
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Summary:Tapered optical fibers (TOFs) are used in many areas of physics and optical technologies ranging from coupling light into nanophotonic components to optical sensing and amplification to interfacing quantum emitters. Here, we study the fundamental torsional mechanical mode of the nanofiber-waist of a TOF using laser light. We find that this oscillator features a quality factor of up to \(10^7\) and a \(Qf\) product of 1 THz. We damp the thermal motion from room temperature to 28(7) mK by means of active feedback. Our results might enable new types of fiber-based sensors and lay the foundation for a novel hybrid quantum optomechanical platform.
ISSN:2331-8422
DOI:10.48550/arxiv.2301.07792